CN101299946B - Rotation lock device - Google Patents
Rotation lock device Download PDFInfo
- Publication number
- CN101299946B CN101299946B CN2006800413775A CN200680041377A CN101299946B CN 101299946 B CN101299946 B CN 101299946B CN 2006800413775 A CN2006800413775 A CN 2006800413775A CN 200680041377 A CN200680041377 A CN 200680041377A CN 101299946 B CN101299946 B CN 101299946B
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- Prior art keywords
- ratchet
- guiding piece
- cam
- outstanding
- inclination
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
- B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
- B60N2/22—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable
- B60N2/235—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable by gear-pawl type mechanisms
- B60N2/2356—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable by gear-pawl type mechanisms with internal pawls
- B60N2/236—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable by gear-pawl type mechanisms with internal pawls linearly movable
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
- B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
- B60N2/20—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being tiltable, e.g. to permit easy access
- B60N2/206—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being tiltable, e.g. to permit easy access to a position in which it can be used as a support for objects, e.g. as a tray
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
- B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
- B60N2/32—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles convertible for other use
- B60N2/34—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles convertible for other use into a bed
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- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Chairs For Special Purposes, Such As Reclining Chairs (AREA)
- Seats For Vehicles (AREA)
Abstract
A reclining device (4) of a vehicle seat comprising a ratchet (10), a guide (20), three poles (40a to 40c), and a rotating cam (50). Three arrangement interval dimensions formed by arranging these three poles (40a to 40c) in the circumferential direction are so set that one arrangement interval dimension is larger than the other two arrangement interval dimensions. A projected flat part (11b) with no tooth projected to the radial inner side of the tips of inner teeth (11a) is formed on a part of the inner peripheral surface of the internal gear part (11) of the ratchet (10) in the circumferential direction. The other smaller set two arrangement interval dimensions are set smaller than the length dimension of the projected flat part (11b) in the circumferential direction.
Description
Technical field
The present invention relates to a kind of rotation lock device.More specifically, the present invention relates between a kind of first member that is arranged on coaxial arrangement rotatably and second member and connect the rotation lock device of first member and second member, this rotation lock device can be placed in and allow first member and second member unlock state and the lock-out state in relative rotation that stops first member and second member in relative rotation, and can keep this state.
Background technology
The known example of rotation lock device is by for example inclination-angle regulating device that is used for seat shown in the TOHKEMY 2001-157615 communique.In disclosed device, via inclination-angle regulating device backrest is connected on the seat cushion, thus the angle of inclination of adjustable seat backrest.
In inclination-angle regulating device, the disc guiding piece that is attached to the disc ratchet of backrest and is attached to seat cushion is assembled together in the mode that disc surface separately contacts with each other, so that can relatively rotate.Ratchet has the internal tooth portion that forms along the periphery of this ratchet.Internal tooth portion has the internal tooth that forms in the interior perimeter surface of this internal tooth portion.Internal tooth portion is by axial cylindric outstanding formation the along ratchet, makes internal tooth expose under the state that is attached to guiding piece by ratchet in two inner spaces that disk limited.On the contrary, guiding piece has in the recessed guide portion in the face of forming in the interior disc surfaces of ratchet, makes and can admit a plurality of ratchets (pawl) with external tooth in this recessed guide portion.This leader guides each ratchet, makes ratchet only can upwards move in the footpath of guiding piece.The cam that rotates by the trip lever that is used for the tilt adjustment operation in the central portion setting of guiding piece.This cam is biased to usually and radially outward pushes away ratchet, thereby keeps the state of the internal tooth engagement of the external tooth of ratchet and ratchet.As a result, relatively rotating of ratchet and guiding piece is restricted, thereby inclination-angle regulating device is maintained lock-out state.When carrying out the operation of trip lever, cam stops to the extrapolation ratchet, thus the engagement between the internal tooth of the external tooth of release ratchet and ratchet.As a result, allow relatively rotating of ratchet and guiding piece, thereby inclination-angle regulating device can switch to unlock state.When the operation of trip lever stops, by the bias force rotating cam.As a result, ratchet is radially outward pushed away, thereby this inclination-angle regulating device can automatically return to lock-out state.
Even above-mentioned inclination-angle regulating device has the free zone that the operation of trip lever stops also inclination-angle regulating device to be maintained unlock state.This free zone is formed in the pivot region that seat is not used during in user mode, for example, and the pivot region that backrest turns forward with respect to seat cushion.Especially, anodontia outstanding par is set forms the free zone by local on the interior perimeter surface of the internal tooth portion of ratchet, this outstanding par forms the radially inwardly outstanding top that surpasses internal tooth.That is to say that in the zone that forms outstanding par, when ratchet was radially outward pushed away, any one in the ratchet all may contact this inwardly outstanding outstanding par that surpasses internal tooth, thereby limited the rotation to the cam of other ratchets of extrapolation.As a result, stoped the external tooth of ratchet and the internal tooth of ratchet to be engaged with each other.Therefore, in the pivot region that forms this outstanding par, can under the situation of the mode of operation of not keeping trip lever, change the angle of inclination of backrest.As a result, can easily carry out the folding operation that for example backrest is folded on the seat cushion.
Summary of the invention
Yet in the disclosed related art, outstanding par and ratchet are arranged a plurality of positions of arranging axisymmetrically in a circumferential direction, make lock room and free zone to repeat repeatedly intermittently in a circumferential direction in above-mentioned patent documentation 1.That is to say, in this related art, arrange three or more ratchets in a circumferential direction, the feasible locking intensity that can guarantee inclination-angle regulating device.Yet,, be difficult to guarantee wide pivot region for the combination of continuous each other lock room and free zone.
Make the present invention and solved the problems referred to above.The objective of the invention is, be provided with in a circumferential direction in the structure of three or more ratchets with the locking intensity that improves rotation lock device, the lock room and the free zone of continuous wide region can be set under the situation that assembling parts such as free zone plate for example additionally are not set.
The mode of dealing with problems
In order to address the above problem, rotation lock device of the present invention has following mode.
At first, first invention is intended to a kind of rotation lock device, it is arranged between first member and second member of coaxial arrangement rotationally, and first member and second member are interconnected, and rotation lock device has unlock state in relative rotation that allows first member and second member and the lock-out state in relative rotation that stops first member and second member.Rotation lock device comprises: ratchet, guiding piece, three ratchets and cam.The coaxial setting of a side in this ratchet and first member and second member and be connected to first member and second member in a side, and have disc-shape.This ratchet has from the outer peripheral edge portion of this ratchet described first member of a described direction from described first member and second member and the opposing party in second member cylindrical shape part of giving prominence to vertically, and has the internal tooth that forms in the inner peripheral surface of cylindrical shape part.The coaxial setting of the opposing party in this guiding piece and first member and second member and be connected to first member and second member in the opposing party, and have disc-shape.Under the opposed facing state of the disc surfaces of guiding piece and ratchet, guiding piece is incorporated into ratchet, makes guiding piece and ratchet to relatively rotate.These three ratchets be arranged on to devices spaced apart on the circumferencial direction of guiding piece guiding piece in the face of on the disc surfaces of ratchet.Ratchet is maintained on the guiding piece, only can make progress in the footpath of guiding piece and move, and have the external tooth in the radially-outer surface that is formed on this ratchet.This cam is coaxial to be arranged on the guiding piece, can be around axial rotation.When cam during around axial rotation, cam is along radially three ratchets of outside thruster from the inboard of guiding piece, thus the internal tooth engagement in the inner peripheral surface of the external tooth that makes ratchet and the cylindrical shape part that is formed on ratchet.Owing to the layout along the circumferential direction of three ratchets defines three spacing distances.One of them spacing distance is determined to be greater than all the other two spacing distances.Single position on the part of the inner peripheral surface of the cylindrical shape of ratchet part, circumferencial direction at ratchet forms outstanding par.Outstanding par lacks internal tooth and the radially inwardly outstanding top that surpasses internal tooth, and two spacing distances of less all the other are determined to be the circumferential length less than outstanding par.
Further, illustrate that " the single position on the circumferencial direction in the part of the inner peripheral surface of the cylindrical shape of ratchet part, at ratchet; form outstanding par " not only comprises the meaning of " forming outstanding continuously projection at single position ", also comprises the meaning of " forming outstanding intermittently projection at single position ".
According to first invention, does not disturb in the pivot region of any one ratchet that is pushed away by cam the outstanding par in being formed on ratchet, by cam each ratchet that pushes away and the internal tooth engagement that is formed in the ratchet.As a result, obtained the lock-out state in relative rotation of restriction ratchet and guiding piece.Therefore, do not disturb the pivot region of each ratchet to be defined as the lock room that this rotation lock device can be placed in lock-out state outstanding par.In addition, the outstanding par in being formed on ratchet and any one ratchet that is pushed away by cam be mutually in the pivot region of mutual interference, stops moving of the ratchet that pushed away by cam in the position of the outstanding par of ratchet contact.As a result, limit cam and pushed away the rotation of each ratchet, thereby obtained to stop the external tooth of each ratchet and the intermeshing unlock state of internal tooth of ratchet.Therefore, outstanding par disturbs the pivot region of any one ratchet to be confirmed as the free zone that this rotation lock device is not placed in lock-out state.
Single position on the part of the inner peripheral surface of ratchet, circumferencial direction at ratchet forms outstanding par.When being disposed in, the outstanding par that is formed on single position is limited to two qualifications in the circumferential area between the ratchet when middle than of large-spacing distance, this zone does not comprise the 3rd ratchet, should not disturb the ratchet that is pushed in outstanding par so, allowed the joint of pawl-and-gearing thus.Therefore, obtained the lock room by bigger spacing distance.In addition, in the time of in this outstanding par is disposed in corresponding to the zone of remaining two less spacing distances, these two less spacing distances are confirmed as the circumferential length less than outstanding par, so should outstanding par disturb in the ratchet that is pushed at least one to define the ratchet of less spacing distance, stoped the joint of pawl-and-gearing thus.Therefore, when comprising remaining two spacing distances, obtained the free zone continuous continuously and widely with the lock room.
Second invention is intended to above-mentioned first invention, wherein, three spacing distances that limit owing to the layout of three ratchets are confirmed as: move through between three ratchets in the zone of all the other less two spacing distances in outstanding par, when pushing away ratchet, at least one and the outstanding par that limit in the ratchet of less spacing distance always are in contact with one another.
According to second invention, when this outstanding par is disposed in the circumferential area that comprises the 3rd ratchet, between wherein the 3rd ratchet is arranged on across two less spacing distances between two ratchets upwards arranging in week, in the ratchet at least one of being pushed that limits less spacing distance always disturbed in this outstanding par.
Next, the 3rd invention is intended to above-mentioned first or second invention, wherein, guiding piece is provided with the support portion integratedly, the radially inward-pointing inner peripheral surface of this support portion has the circular-arc spill of the outer peripheral face of the outer peripheral face that can contact cam and supporting cam wheel, and the support portion is disposed in the bigger place in the spacing distance that is limited by three ratchets.
According to the 3rd invention, the reaction force that the outer peripheral face of cam that three ratchets are pushed away towards the internal tooth of ratchet is exerted pressure.Because one of them spacing distance of ratchet is defined as greater than remaining two spacing distance, this reaction force can circumferentially anisotropically act on the cam.Yet, receive reaction force heterogeneous by the support portion of the outer peripheral face that contacts cam, thereby this reaction force heterogeneous is balanced in a circumferential direction.
Next, the 4th invention is intended to above-mentioned the 3rd invention, wherein by described first member of described other direction from described first member and second member and the described side in second member on the thickness direction of the guiding piece of disc-shape partly die-cut guiding piece form the support portion.
According to the 4th invention, can be by at first die-cut guiding piece of thickness direction of guiding piece and integrally formed support portion makes this support portion outstanding vertically from the disc surfaces of guiding piece.
Next, the 5th invention is intended to the above-mentioned the 3rd or the 4th invention, wherein, at the interval with 90 degree on the circumferencial direction of guiding piece three ratchets and support portion is arranged on the disc surfaces of guiding piece.
According to the 5th invention, three ratchets and support portion can be arranged on equal angles ground on the circumferencial direction of guiding piece.As a result, when cam was pushed these three ratchets, the reaction force that is applied on the cam was supported by the support portion, thereby this reaction force is able to homogenising in a circumferential direction.
The invention effect
By the way, the invention provides following effect.
At first, according to first invention, circumferentially the spacing distance of three ratchets that are provided with is confirmed as making one of them spacing distance greater than all the other two spacing distances, and less spacing distance is less than the circumferencial direction length of outstanding par.Therefore, can increase the locking intensity of rotation lock device.In addition, under the not separated situation that assembling parts such as free zone plate for example is provided, form continuous free zone and lock room serially and widely.
Further, according to second invention, the outstanding par of formation free zone and the layout and the structure of three ratchets have been illustrated.Therefore, can further illustrate the structure of first invention.
Further, according to the 3rd invention, owing to can homogenising be applied to the support portion of the circumferential non-homogeneous reaction force on the cam, thus joint that can this pawl-and-gearing of stabilisation, thus the locking intensity of rotation lock device further improved.
Further, according to the 4th invention, form the support portion by half die-cut guiding piece.Therefore, can easily form support portion with high support strength.
Further, according to the 5th invention, three ratchets and support portion can be arranged with the equal angles ground, interval of 90 degree in a circumferential direction.As a result, in a circumferential direction cam is applied under the state of uniform power, this cam can push away three ratchets towards the internal tooth of ratchet.Therefore, can further improve the locking intensity of rotation lock device.
Description of drawings
Fig. 1 is the exploded perspective view according to the inclination-angle regulating device of first embodiment;
Fig. 2 is the schematic diagram of the movable range of diagram backrest;
Fig. 3 is the front view of inclination-angle regulating device;
Fig. 4 is the rearview of inclination-angle regulating device;
Fig. 5 is the side view of inclination-angle regulating device;
Fig. 6 is the cutaway view along the line VI-VI intercepting of Fig. 5, illustrates the internal structure of inclination-angle regulating device;
Fig. 7 is that diagram is formed on outstanding par in the ratchet at the schematic diagram of the state of lock room;
Fig. 8 is that diagram is formed on outstanding par in the ratchet at the schematic diagram of the state of free zone;
Fig. 9 is the schematic diagram of the lock room and the free zone of diagram inclination-angle regulating device;
Figure 10 is the exploded perspective view of the integrated structure of diagram ratchet and back frame;
Figure 11 is the exploded perspective view of the integrated structure of diagram guiding piece and cushion frame;
Figure 12 is the front view of ratchet, and diagram is according to the structure of the outstanding par of second embodiment;
Figure 13 is the front view of ratchet, and diagram is according to the structure of the outstanding par of the 3rd embodiment;
The explanation of Reference numeral
1 seat
2 backrests
2f back frame (side in first member and second member)
The 2a pin hole
2b D-pin hole
The 2c through hole
3 seat cushions
3f cushion frame (side in first member and second member)
The 3a pin hole
3b D-pin hole
The 3c through hole
4 inclination-angle regulating devices (rotation lock device)
The 4r central axis
10 ratchets
Card in the 10a
The outer card of 10b
The 10c shaft insertion hole
11 internal tooth portions (cylindrical shape part)
The 11a internal tooth
11b gives prominence to the par
11c gives prominence to the par
11d pin member (outstanding par)
The 12a pin
12b D-pin
20 guiding pieces
Card in the 20a
The outer card of 20b
The 20c shaft insertion hole
21 peripheries
22a～22c guides slot part
23 support portions
The 24a pin
24b D-pin
25 junction surfaces
30 settle plate
31 ratchets keep face
32 guiding pieces keep face
40a～40c ratchet
41a～41c external tooth
42a～42c draws return-enclosure
43a～43c junction surface
50 rotating cams (cam)
51a～51c operating wrist
The 51d support portion
52 pilot holes
60 hinged cams
61 press sections
62 axial regions
63 junction surfaces
70 spring members
D1～D3 spacing distance
The U action bars
The L lock room
The F free zone
The specific embodiment
The embodiment that implements best mode of the present invention hereinafter will be described with reference to the accompanying drawings.In the following embodiments, the structure of rotation lock device of the present invention is applied to regulate the inclination-angle regulating device at angle of inclination of the backrest of seat.
First embodiment
At first, will be with reference to the structure of figure 1～Figure 13 explanation according to the inclination-angle regulating device 4 of first embodiment.In Fig. 6,, should be interpreted as them and draw with dotted line although draw with solid line by the external tooth 41a～41c of empty lead-out wire indication.
As shown in Figure 2, the inclination-angle regulating device 4 of present embodiment forms the backrest 2 of connection seat 1 and the jockey of seat cushion 3.Inclination-angle regulating device 4 is arranged in the both lateral sides of seat 1 in pairs.Inclination-angle regulating device 4 is arranged in the back frame 2f of the framework that constitutes backrest 2 and constitutes between the cushion frame 3f of framework of seat cushion 3, thereby they are connected to each other.Back frame 2f is corresponding to the side in first member of the present invention and second member, and cushion frame 3f is corresponding to the opposing party in first member of the present invention and second member.
Inclination-angle regulating device 4 have allow backrest 2 around central axis 4r with respect to seat cushion 3 bindiny mechanism in relative rotation.Therefore, angle of inclination that can adjustment seat chair back 2.Especially, shown in two dotted lines among Fig. 2, backrest 2 can fold into that the angular ranges at 180 degree rotate between the state that state on the seat cushion 3 and this backrest 2 topple over fully backward at this backrest 2 forward.In addition, inclination-angle regulating device 4 is configured to and can keep between the lock-out state at angle of inclination of expectation at the adjustable in inclination angle unlock state of backrest 2 and switches.Especially, inclination-angle regulating device 4 remains on lock-out state usually, so that the angle of inclination of backrest 2 can be maintained at desired angle.In addition, can these inclination-angle regulating devices 4 side by side be switched to unlock state by the pull operation of executable operations bar U, this action bars U is connected to (being arranged in front side as shown in the figure) in the inclination-angle regulating device 4.Like this, angle of inclination that can adjustment seat chair back 2.In addition, inclination-angle regulating device 4 is configured to: when the pull operation that stops action bars U, along with action bars U turns back to the home position under the effect of bias force, these inclination-angle regulating devices 4 side by side turn back to lock-out state.As a result, backrest 2 is maintained at the angle of inclination of such adjusting.
To illustrate in greater detail above-mentioned structure.Inclination-angle regulating device 4 is configured to respectively: can sway by the operating axis (not shown) that makes the central part that is arranged at inclination-angle regulating device and switch locking and non-locking motion.In addition, these operating axis are integrally connected to and are arranged on the bar-shaped connecting elements of length to extend in the horizontal in the seat 1.One in the operating axis is integrally connected to aforesaid operations bar U.Therefore, when the last pulling process of executable operations bar U, a pair of left and right sides inclination-angle regulating device 4 side by side switches to unlock state from lock-out state.
Between backrest 2 and seat cushion 3, arrange the force application spring (not shown), with along the rotation direction that allows backrest 2 to rotate forward towards seat cushion 3 to these backrest 2 application of forces.Therefore, backrest 2 is configured to: when inclination-angle regulating device 4 switched to unlock state, this backrest 2 was folding forward automatically.
Each inclination-angle regulating device 4 has and is arranged on backrest 2 lock room L and the free zone F in the movable range in relative rotation.
The former is that lock room L is the zone that inclination-angle regulating device 4 turns back to lock-out state when the pull operation of aforesaid operations bar U stops.The L shaped one-tenth in lock room is in pivot region, and in this pivot region, the passenger who is sitting on the seat 1 uses backrest 2 as backrest.In the present embodiment, the L shaped one-tenth in lock room is in the angular regions of the posture that recedes at backrest 2.
Even the latter is free zone F is that the pull operation to action bars U of carrying out stops, and inclination-angle regulating device 4 also is maintained at the zone of unlock state.Free zone F is formed in the pivot region that is not used when using seat 1.In the present embodiment, free zone F is formed in the angular regions that backrest 2 is in the posture that turns forward.Therefore, because the such free zone F that forms, carry out under the state that can stop that backrest 2 is folded into operation on the seat cushion 3 in the pull operation of action bars U.Therefore, can easily carry out this operation.
Next, the structure of inclination-angle regulating device 4 will be explained.As mentioned above, although inclination-angle regulating device 4 is arranged in the horizontal left and right sides of seat 1 in pairs, these inclination-angle regulating devices have essentially identical structure.Therefore, in the following description, will the structure of one of them only be described.
That is to say, as shown in Figure 1, form inclination-angle regulating device 4 by ratchet 10, guiding piece 20, arrangement plate 30, ratchet 40a-40c, rotating cam 50, hinged cam 60 and spring member 70 are combined into a unit.In addition, rotating cam 50 is corresponding to cam of the present invention.
Particularly, ratchet 10 forms and has roughly disc-shape.Ratchet 10 is formed with cylindrical shape internal tooth portion 11, and its periphery along ratchet forms and be outstanding vertically from interior card 10a.In addition, internal tooth portion 11 is corresponding to cylindrical shape part of the present invention.Form internal tooth portion 11 by first die-cut ratchet 10 of thickness direction at ratchet 10.Internal tooth portion 11 has the internal tooth 11a in the cylindrical shape inner peripheral surface that is formed on internal tooth portion.Yet, form anodontia outstanding par 11b at the part place along the circumferential direction of inner peripheral surface.Should form radially the inwardly top of the outstanding internal tooth 11a of surpassing by outstanding par 11b.
In addition, as shown in figure 10, in the outer card 10b of ratchet 10, form pin 12a and D-pin 12b.With shaft insertion hole 10c radially spaced positions be on the circumferencial direction continuously that (in series) forms pin 12a and D-pin 12b.Form pin 12a and D-pin 12b by first die-cut ratchet 10 of thickness direction, make pin 12a and D-pin 12b outstanding vertically from outer card 10b at ratchet 10.Pin 12a and D-pin 12b are configured as the pin hole 2a and the D-pin hole 2b that can be fitted into the correspondence that is respectively formed among the back frame 2f.Form D-pin 12b by partly removing cylindrical shape, make D-pin 12b and cylindrical pin 12a differentiate with D-tee section.As a result, be oriented at ratchet 10 under the state of predetermined direction, ratchet 10 can be assembled to back frame 2f.Therefore, under the shaft insertion hole 10c of ratchet 10 and the coaxillay aligned state of through hole 2c that is formed among the back frame 2f, ratchet 10 and back frame 2f can be bonded with each other.Under the state that the plate face of the outer card 10b of ratchet 10 and back frame 2f is in contact with one another, ratchet 10 and back frame 2f are mutually combined be one by carry out arc welding in the contact portion of ratchet and back frame, in this contact portion, pin 12a and D-pin 12b are assembled.
Next, guiding piece 20 will be described.As shown in Figure 1, guiding piece 20 forms and has roughly disc-shape.Under the state of card 20a in the face of the interior card 10a of ratchet 10, guiding piece 20 is assembled into ratchet 10 in the disc of guiding piece 20.In addition, guiding piece 20 is formed with along the periphery formation of guiding piece 20 and from the outstanding vertically cylindrical shape of interior card 20a and centers on part 21.Form around part 21 by first die-cut guiding piece 20 of thickness direction at guiding piece 20.Be sized to from external mounting to the cylindrical shape internal tooth portion 11 that is formed on the ratchet 10 around part 21, thereby around this internal tooth portion.Therefore, under the state that guiding piece 20 and ratchet 10 have fitted together, the outer peripheral face of the internal tooth portion 11 of ratchet 10 is by supporting around part 21.As a result, by the internal tooth portion 11 that supports ratchets 10 around part 21 to limit its moving radially.Especially, supporting internal tooth portion 11 is relatively rotating it with respect to centering on part 21 when the inner peripheral surface around part 21 slides.Under the state that guiding piece 20 and ratchet 10 have fitted together, be formed on internal tooth 11a in the internal tooth portion 11 and expose the inner space that is limited between by ratchet 10 and guiding piece 20.
Shaft insertion hole 20c is formed in the central part of disc guiding piece 20, and formed hole is as axially extending bore.Under the state that guiding piece 20 and ratchet 10 have fitted together, shaft insertion hole 20c is with respect to the shaft insertion hole 10c coaxial arrangement of ratchet 10.Shaft insertion hole 20c is shaped so that aforesaid operations axle (not shown) can insert wherein around axial rotation ground.
In addition, by with guiding piece 20 outward card depress and in the interior card 20a of guiding piece 20, form recessed guiding slot part 22a-22c.Form guiding slot part 22a-22c by first die-cut guiding piece 20 of thickness direction, make this guiding slot part 22a-22c extend radially outward from the center of guiding piece 20 at guiding piece 20.Especially, guiding slot part 22a-22c is formed on three positions that the circumferencial direction along guiding piece 20 on the guiding piece 20 is determined at interval with 90 degree, thereby extends integratedly from the center of guiding piece 20.In addition, ratchet 40a-40c is separately positioned among the guiding slot part 22a-22c.Guiding slot part 22a-22c guiding ratchet 40a-40c is so that it is only upwards mobile in the footpath of guiding piece.The layout of ratchet 40a-40c is shown in Figure 6.
Refer again to Fig. 1, by guiding piece 20 is depressed and form tab-like support portion 23 among the interior card 20a of guiding piece 20 from outer card.Form support portion 23 by first die-cut guiding piece 20 of thickness direction at guiding piece 20.Support portion 23 is formed on the position (becoming 90 degree positions at interval with guiding slot part 22c with guiding slot part 22a) between guiding slot part 22a and the guiding slot part 22c.Fig. 6 shows the support portion of looking from the interior card of guiding piece 20 23.As shown in the drawing, the radially inward-pointing inner peripheral surface of support portion 23 has the circular-arc spill of the support portion 51d that can contact following rotating cam 50.
In addition, as shown in figure 11, in the outer card 20b of guiding slot part 22a-22c, form pin 24a and D-pin 24b.With shaft insertion hole 20c radially spaced positions be on the circumferencial direction and form pin 24a and D-pin 24b continuously.Form pin 24a and D-pin 24b by first die-cut guiding piece 20 of thickness direction, make pin 24a and D-pin 24b outstanding vertically from outer card 20b at guiding piece 20.Pin 24a and D-pin 24b are configured as the pin hole 3a and the D-pin hole 3b that can be fitted into the correspondence that is respectively formed among the cushion frame 3f.Form D-pin 24b by partly removing cylindrical shape, make D-pin 24b and cylindrical pin 24a differentiate with D-tee section.As a result, be oriented at guiding piece 20 under the state of predetermined direction, guiding piece 20 can be assembled to cushion frame 3f.Therefore, under the shaft insertion hole 20c of guiding piece 20 and the coaxillay aligned state of through hole 3c that is formed among the cushion frame 3f, guiding piece 20 and cushion frame 3f can be bonded with each other.Under the state that the plate face of the outer card 20b of guiding piece 20 and cushion frame 3f is in contact with one another, guiding piece 20 and cushion frame 3f are mutually combined be one by carry out arc welding in the contact portion of guiding piece and cushion frame, in this contact portion, pin 24a and D-pin 24b are assembled.
The result, relatively rotating of the guiding piece 20 that is combined as a whole along with the ratchet 10 that is combined as a whole with back frame 2f shown in Figure 10 with cushion frame 3f shown in Figure 11, as shown in Figure 2, inclination-angle regulating device 4 is with respect to seat cushion 3 swiveling seat backrests 2, thus angle of inclination that can adjustment seat chair back 2.
Next, refer again to Fig. 1, will illustrate and settle plate 30.Settle plate 30 by forming, make and settle plate 30 to have step cylindrical shape (annular) at first die-cut thin hollow disc shape member of its thickness direction.Settle plate 30 as the pressing member that is clamped in positioned opposite on the thickness direction and ratchet 10 that fits together and guiding piece 20.Especially, the surface element in the inner peripheral edge surfaces of arrangement plate 30 forms the ratchet maintenance face 31 of the outer peripheral edges of the outer card that contacts ratchet 10.In addition, settle plate 30 from ratchet keep face 31 to outer peripheral edges with the stepped form bending, thereby extend along the outer peripheral edges structure of ratchet 10 and guiding piece 20.In addition, will settle the surface element in the outer peripheral edges of plate 30 to curve inwardly by crimp, thereby the guiding piece of periphery that forms the outer card of contact guidance spare 20 keep face 32.Plate 30 is settled in assembling under the state that forms small gap between ratchet 10 and the guiding piece 20.As a result, ratchet 10 and guiding piece 20 are retained as and can keep face 31 and guiding piece to keep relatively rotating smoothly between the face 32 at ratchet.Fig. 5 shows the state of settling plate 30 assembled.
Next, three ratchet 40a-40c will be described.As shown in Figure 1, each ratchet 40a-40c forms plate-like piece.In addition, as shown in Figure 6, ratchet 40a-40c is separately positioned among the guiding groove 22a-22c, and guiding groove 22a-22c is formed among the interior card 20a of guiding piece 20.As a result, the both sides of each ratchet 40a-40c are by each recessed guiding slot part 22a-22c guiding, make each ratchet 40a-40c can be only guiding piece 20 radially on advance and retreat.External tooth 41a-41c is respectively formed in the radially-outer surface of ratchet 40a-40c.External tooth 41a-41c is configured as it can be meshed with the internal tooth 11a that is formed in the ratchet 10.Therefore, under the assembled state of inclination-angle regulating device 4, along with ratchet 40a-40c is radially outward advanced, external tooth 41a-41c can with the internal tooth 11a engagement of ratchet 10.As a result, the ratchet 40a-40c by by guiding piece 20 guiding can limit relatively rotating of ratchet 10 and guiding piece 20.Therefore, inclination-angle regulating device 4 is placed in lock-out state.
Here, the advance and retreat motion of each ratchet 40a-40c is carried out in the rotational motion of the rotating cam 50 at the central portion place by being arranged on guiding piece 20.Especially, draw the inside radially that return-enclosure 42a-42c and junction surface 43a-43c are formed on ratchet 40a-40c.What draw return-enclosure 42a-42c effect is respectively that the operating wrist 51a-51c that will be formed in the rotating cam 50 draws back.The effect of junction surface 43a-43c be respectively be formed on rotating cam 50 in operating wrist 51a-51c engage.Each draws return-enclosure 42a-42c and forms to have when rotating cam 50 rotates and can receive back-shaped shape of drawing of operating wrist 51a-51c.In addition, each junction surface 43a-43c form have when operating wrist 51a-51c be received in when drawing among the return-enclosure 42a-42c can bonding operation wrist 51a-51c shape.Therefore, when operating wrist 51a-51c is received in when drawing among the return-enclosure 42a-42c, by junction surface 43a-43c inside drawing ratchet 40a-40c radially.Ratchet 40a-40c by radially inwardly the state of drawing by being shown in dotted line among Fig. 6.
Because three ratchet 40a-40c arrange with the interval of 90 degree, so limit three spacing distance D1-D3 along the circumferencial direction of inclination-angle regulating device 4 in inclination-angle regulating device 4.Especially, spacing distance D1 is the spacing distance between ratchet 40a and the ratchet 40c.Spacing distance D2 is the spacing distance between ratchet 40a and the ratchet 40b.In addition, spacing distance D3 is the spacing distance between ratchet 40b and the ratchet 40c.Spacing distance D1 is confirmed as bigger than all the other two spacing distance D2 and D3.In addition, spacing distance D2 and D3 are confirmed as the circumferential length less than above-mentioned outstanding par 11b.
Next, refer again to Fig. 1, rotating cam 50 will be described.Rotating cam 50 is arranged in the central portion of interior card 20a of guiding piece 20 rotatably about an axis.Especially, as shown in Figure 6, rotating cam 50 is set among the guiding slot part 22a-22c, makes this rotating cam 50 and radially upcountry arranges with respect to three ratchet 40a-40c that are arranged among the guiding slot part 22a-22c.
Rotating cam 50 has operating wrist 51a-51c, and this operating wrist 51a-51c extends radially outwardly and is formed on three circumferential locations corresponding to ratchet 40a-40c.Operating wrist 51a-51c is configured as along clockwise direction shown in the figure from rotating cam 50 perimembranous and stretches out.When making rotating cam 50 for example the state shown in the solid line from Fig. 6 clockwise rotates, operating wrist 51a-51c enters to be formed on and draws return-enclosure 42a-42c among the ratchet 40a-40c, thereby engages with junction surface 43a-43c.As a result, shown in the dotted line among the figure, owing to clockwise rotating of rotating cam 50, ratchet 40a-40c is by the radially inside drawing of difference.In addition, when making rotating cam 50 when the state shown in the dotted line rotates counterclockwise, operating wrist 51a-51c can be along the inner peripheral surface that draws return-enclosure 42a-42c radially to extrapolation ratchet 40a-40c.As a result, shown in the solid line among this figure, the external tooth 41a-41c of ratchet 40a-40c presses the internal tooth 11a of ratchet 10.Rotating cam 50 with hereinafter with the explanation hinged cam 60 is connected, make this rotating cam 50 usually by towards rotate counterclockwise the application of force.As a result, ratchet 40a-40c is maintained at the state that ratchet 40a-40c is rotated cam 50 application of forces and presses the inner peripheral surface of ratchet 10 usually.As Fig. 1 obviously shown in, form the pilot hole 52 that can receive hinged cam 60 at the central part of rotating cam 50.
Refer again to Fig. 6, rotating cam 50 has support portion 51d, and the circumference of this support portion 51d radially outwards expands partly.Form support portion 51d at circumferential position corresponding to support portion 23.Support portion 51d is configured as circular-arc expansion, makes the outer peripheral face of support portion 51d can contact the inner peripheral surface of support portion 23.As a result, the reaction force that produces when rotating cam 50 is pressed against ratchet 40a-40c the inner peripheral surface of ratchet 10 is received by the support portion 23 of the outer peripheral face of contact support portion 51d.That is to say that when rotating cam 50 will be pressed against the inner peripheral surface of ratchet 10 along three ratchet 40a-40c of circumferential non-homogeneous layout, rotating cam 50 was subjected to circumferential reaction force heterogeneous.Yet this reaction force heterogeneous is owing to the following fact is supported, and promptly support portion 51d can contact support portion 23.That is to say that the circumferential reaction force that is applied on the rotating cam 50 can be come homogenising by the ratchet 40a-40c and the support portion 51d that arrange respectively with the interval of 90 degree.As a result, ratchet 40a-40c can stably be pressed against the inner peripheral surface of ratchet 10.
Next, refer again to Fig. 1, hinged cam 60 will be described.Hinged cam 60 is configured as in the pilot hole 52 that can be fitted into rotating cam 50.Hinged cam 60 is configured as and can receives aforesaid operations axle (not shown) therein, to connect as one with this operating axis.Like this, when operating axis was swayed, hinged cam 60 can sway integratedly with operating axis.Fig. 6 shows the state in the pilot hole 52 that hinged cam 60 is assembled into rotating cam 50.As shown in this Fig, hinged cam 60 has press section 61, and this press section 61 forms radially outwards outstanding in the circumferential part office of hinged cam 60.When hinged cam 60 swayed, the inner peripheral surface of pilot hole 52 was pushed in press section 61, thereby rotating cam 50 is rotated in the direction.
Refer again to Fig. 1, hinged cam 60 has tubular axial region 62, and this tubular axial region 62 forms along axially outstanding in one direction at the central portion of hinged cam 60.In addition, tubular axial region 62 is inserted among the shaft insertion hole 20c of guiding piece 20, makes hinged cam 60 be directed part 20 and supports rotatably about an axis.In addition, form the square junction surface 63 of the inner that can engage following spring member 70 at the front end of axial region 62.Junction surface 63 is configured as and is inserted under the state among the shaft insertion hole 20c of guiding piece 20 outstanding from the outer card 20b of guiding piece 20 at axial region 62.Therefore, junction surface 63 is in the inner of its extrusion position combined spring member 70.Fig. 3 shows the engagement state of spring member 70.As shown in the drawing, the inner of the inner end engages hinged cam 60 of spring member 70, and the outer end of spring member 70 engages from the junction surface 25 of the outstanding pin shape of the outer card 20b of guiding piece 20.As a result, hinged cam 60 is setovered as the counter clockwise direction among Fig. 6 by spring member 70 applied forces edge usually.As a result, hinged cam 60 is biasing rotating cam 50 counterclockwise, thereby radially outward pushes away ratchet 40a-40c.Therefore, the internal tooth 11a of ratchet 40a-40c and ratchet 10 engagement, thus inclination-angle regulating device 4 can be maintained lock-out state.
As mentioned above, hinged cam 60 by unitary rotation be connected to the operating axis (not shown).In addition, operating axis by with connect as one with reference to the illustrated action bars U of figure 2, thereby rotate this operating axis by the pull operation of executable operations bar U.Particularly, when the pull operation of executable operations bar U, operating axis is resisted above-mentioned bias force along the hinged cam 60 that clockwise rotates shown in Figure 6.As a result, hinged cam 60 clockwise rotates rotating cam 50, radially inwardly draws back the ratchet 40a-40c with the internal tooth 11a of ratchet 10 engagement thus.As a result, inclination-angle regulating device 4 switches to non-locked position.In addition, when action bars U (see figure 2) pull operation finished, hinged cam 60 rotated counterclockwise under the effect of the bias force of action bars U, thereby made the internal tooth 11a engagement of ratchet 40a-40c and ratchet 10 once more.Therefore, inclination-angle regulating device 4 can be switched to lock-out state.
With reference to figure 2, when backrest 2 under the state of toppling over fully backward when (by the state shown in the dotted line), inclination-angle regulating device 4 is placed on turned position as shown in Figure 6.That is to say that inclination-angle regulating device 4 is in following turned position, in this turned position, the outstanding par 11b in forming ratchet 10 inner peripheral surfaces with arrange that the ratchet 40c on right side is circumferentially adjacent in the drawings.Under this state, outstanding par 11b is disposed in the zone of spacing distance D1, thereby does not disturb any one the ratchet 40a-40c that is pushed away by rotating cam 50.Therefore, under this state, when pushing away ratchet 40a-40c by cursor 50, ratchet 40a-40c can mesh with the internal tooth 11a of ratchet 10.
With reference to figure 2, when the above-mentioned state of toppling over fully backward from backrest 2 when backrest 2 lifted, outstanding par 11b rotated counterclockwise from state shown in dotted lines in Figure 7.In addition, the above-mentioned result who rotates counterclockwise as outstanding par 11b, in the slewing area before outstanding par 11b arrives following turned position, outstanding par 11b does not disturb any one among the ratchet 40a-40c that is pushed away by rotating cam 50, in above-mentioned turned position, arrange in the outstanding circumferential neighborhood graph 7 of par 11b left side in the drawings by the ratchet 40a shown in the solid line.Outstanding par 11b does not disturb the pivot region of ratchet 40a-40c to be confirmed as lock room L, and in the L of lock room, when the rotating operation of shut-down operation bar U (see figure 2), inclination-angle regulating device 4 can be placed in lock-out state.In the present embodiment, lock room L is made as angular range with 88 degree.Solid line among Fig. 2 illustrates the state that backrest 2 is raised to the boundary position of lock room L.
In addition, with reference to figure 2, when the boundary position that makes backrest 2 from the lock room L shown in the solid line further rotated along the direction that leans forward, outstanding par 11b turned position shown in the solid line from Fig. 8 further rotated counterclockwise.In addition, among Fig. 8 among the turned position shown in the solid line and Fig. 7 the turned position shown in the solid line identical.As a result, the ratchet 40a on the left of outstanding par 11b moves to outstanding par 11b and arranges in the drawings is overlapping turned position circumferentially.In this turned position, outstanding par 11b disturbs the ratchet 40a that is pushed away by rotating cam 50.As mentioned above, outstanding par 11b is configured as radially the inwardly top of the outstanding internal tooth 11a of surpassing.Therefore, because outstanding par 11b, has limited rotating cam 50 to the interference of ratchet 40a to the rotating counterclockwise of extrapolation ratchet 40a, thus being meshing with each other of internal tooth 11a that has stoped ratchet 40a-40c and ratchet 10.
Described with reference to figure 6 as mentioned, the circumferential lengths of outstanding par 11b is defined as greater than spacing distance D2 and spacing distance D3.Therefore, when outstanding par 11b owing to rotating counterclockwise the zone that is arranged in spacing distance D2 or spacing distance D3, outstanding par 11b always disturbs at least one among at least one or ratchet 40b and the 40c among ratchet 40a and the 40b, this ratchet 40a and 40b are across spacing distance D 2 circumferential arrangement, and this ratchet 40b and 40c circumferentially arrange on spacing distance D3.In addition, when making outstanding par 11b be arranged in the ratchet 40b of the circumferential downside of the overlapping figure of being in or to be in the position of ratchet 40c on right side of figure, outstanding par 11b also can disturb ratchet 40b or the ratchet 40c that is pushed.That is to say, as shown in Figure 8, in the present embodiment, all remaining pivot region that outstanding par 11b can rotate counterclockwise from the turned position shown in the solid line are confirmed as free zone F, in the F of free zone, even stopped the rotating operation of action bars U (see figure 2), inclination-angle regulating device 4 also is maintained at unlock state.With reference to figure 2, in the present embodiment, after the boundary position of the lock room L shown in the solid line turns forward, arrive its pivot region before folding into position on the seat cushion 3 at backrest 2 and be confirmed as free zone F at backrest 2.Free zone F is set as the angular range with 92 degree.
That is to say that as shown in Figure 9, in the inclination-angle regulating device 4 of present embodiment, all pivot region except above-mentioned lock room L are confirmed as free zone F.As a result, can cover the wide range that up 360 is spent by lock room L with from one group of pivot region that L continuous free zone F in lock room forms.
Next, with reference to figure 2, with the using method of explanation present embodiment.In the original state of seat 1, backrest 2 is in the posture of lifting shown in the solid line.Under this state, inclination-angle regulating device 4 in the pivot region of lock room L, thereby under the fixing lock-out state in the angle of inclination of backrest 2.
At first, thus explanation is placed on the method for folded state from original state towards seat cushion 3 backrest 2 that turns forward.As the first step, upwards pulling process bar U is to switch to unlock state with inclination-angle regulating device 4.As a result, by the bias force swiveling seat backrest 2 that applies along the direction that turns forward, thereby backrest 2 is folded on the upside of seat cushion 3.At this moment, after the above-mentioned position shown in the solid line turned forward a little, inclination-angle regulating device 4 was placed in the pivot region of free zone F at backrest 2.Therefore, under this state, even stopped the pull operation of action bars U, inclination-angle regulating device 4 also can be maintained at unlock state.As a result, under the situation of the operation that does not continue action bars U, backrest 2 can turn forward and fold automatically.
Next, explanation is made backrest 2 turn back to the original method of lifting state from folding attitude.In this case, can resist the bias force that on the direction that turns forward, applies and lift backrest 2 simply.That is to say, because inclination-angle regulating device 4 is maintained at unlock state up to backrest 2 is raised to the state of lifting, so can lift backrest 2 under the situation of the operation that does not continue action bars U.In addition, when backrest 2 reaches when lifting state, thereby inclination-angle regulating device 4 is placed lock room L to switch to lock-out state automatically.As a result, backrest 2 is fixed to corresponding to the angle of inclination of lifting state.
Next, explanation is made backrest 2 from lifting the sweptback method of state.As the first step, upwards pulling process bar U is so that inclination-angle regulating device 4 is switched to unlock state.After this, in operating operation bar U, the bias force that backrest 2 opposings apply on the direction that turns forward recedes, thus the angle of inclination of adjustment seat chair back.After this, when the pull operation of action bars U stopped, inclination-angle regulating device 4 was switched to lock-out state.As a result, the angle of inclination of backrest 2 is fixed to the position of being regulated.The angle of inclination of backrest 2 can be adjusted to angle corresponding to the position that recedes shown in the dotted line among the figure.
Therefore, inclination-angle regulating device 4 according to this embodiment, spacing distance D1-D3 about three ratchet 40a-40c of circumferential arrangement, spacing distance D1 is defined as greater than other two spacing distance D2 and D3, and two less spacing distance D2 and D3 are defined as the circumferencial direction length less than outstanding par 11b.Therefore, increased the locking intensity of the inclination-angle regulating device 4 that is configured to rotation lock device.In addition, do not providing separately under the situation of assembling parts such as free zone plate for example, lock room L and free zone F can be defined as extending on continuous wide region.
In addition, owing to can make the support portion 23 of the reaction force equilibrium circumferential heterogeneous that is applied to rotating cam 50, can stablize the joint between ratchet 40a-40c and the ratchet 10, thereby increase the locking intensity of inclination-angle regulating device 4.In addition, form support portion 23 by half die-cut guiding piece 20.Therefore, can easily form the support portion 23 of support strength with increase.And, because three ratchet 40a-40c and support portion 23 arrange with the interval equal angles of 90 degree, so can under the state of the power that rotating cam 50 is applied circumferential equilibrium, three ratchet 40a-40c be pushed away towards the internal tooth 11a of ratchet 10 via rotating cam 50.Therefore, can improve the locking intensity of inclination-angle regulating device 4.
Second embodiment
Next, the structure of the inclination-angle regulating device 4 of second embodiment will be described with reference to Figure 12.The difference of the inclination-angle regulating device 4 of this embodiment and the inclination-angle regulating device 4 of first embodiment only is the structure of ratchet 10.Therefore, Figure 12 structure of enlarged drawing diagram ratchet 10.
In the present embodiment, the outstanding par 11c that forms in ratchet 10 is divided into two parts in a circumferential direction.Be similar to the outstanding par 11b (see figure 1) of first embodiment, outstanding par 11c forms does not within it have the no toothed portion of tooth on the side face, and forms radially inwardly outstanding top above internal tooth 11a.In addition, be similar to the outstanding par 11b (see figure 6) of first embodiment, the circumferential lengths of outstanding par 11c, promptly total circumferential lengths of being surveyed between the end of outstanding par 11c is confirmed as greater than two spacing distance D2 and D3.
Therefore, circumferentially outstanding intermittently although outstanding par 11c forms, can obtain the identical effect of outstanding par 11b with first embodiment.
The 3rd embodiment
Next, the structure of the inclination-angle regulating device 4 of the 3rd embodiment will be described with reference to Figure 13.The difference of the inclination-angle regulating device 4 of this embodiment and the inclination-angle regulating device 4 of first embodiment only is the structure of ratchet 10.Therefore, Figure 13 structure of enlarged drawing diagram ratchet 10.
In the present embodiment, be formed on the outstanding par that forms in the ratchet 10 by the pin member 11d in a plurality of inner peripheral surfaces that are embedded in ratchet 10.Pin member 11d is embedded in three circumferential positions on the inner peripheral surface of ratchet 10, and each the outer peripheral face among the pin member 11d forms anodontia smooth surface.In addition, be similar to the outstanding par 11b (see figure 1) of first embodiment, pin member 11d is arranged to radially the inwardly top of the outstanding internal tooth 11a of surpassing.In addition, be similar to the outstanding par 11b (see figure 6) of first embodiment, be confirmed as greater than two spacing distance D2 and D3 being arranged in the circumferential lengths of being surveyed between the pin member 11d at both ends.
Therefore, although arrange in a circumferential direction with the interval of expectation, can obtain the identical effect of outstanding par 11b with first embodiment corresponding to a plurality of pin member 11d of outstanding par.
Except above-mentioned three embodiment, can also implement the present invention in every way.
For example, rotation lock device of the present invention is not limited to the inclination-angle regulating device of the foregoing description, couples together with can various in relative rotation syndetons but may be used on member with coaxial arrangement.
In addition, inclination-angle regulating device can be configured to ratchet and guiding piece can be connected to seat cushion side and seat back side.
In addition, can omit the support portion of the non-homogeneous pressure that receives rotating cam.Yet, in this case,, therefore, to compare with the structure of the foregoing description because the reaction force circumferential heterogeneous of pressure is applied to rotating cam, the locking intensity of inclination-angle regulating device may reduce.In addition, Dui Ying load heterogeneous can be applied to for example miscellaneous part such as hinged cam.
In addition, in the above-described embodiments, three ratchets are arranged on the guiding piece with the interval of 90 degree in a circumferential direction.Yet, as long as one of them spacing distance is confirmed as having no particular limits about three spacing distances greater than other two spacing distances.
In addition, outstanding par is not limited to smooth shape.For example, outstanding par can have the curved shape that bends to not with the external tooth engagement of ratchet.
Claims (5)
1. rotation lock device, it is arranged between first member and second member of coaxial arrangement rotationally, and described first member and second member are interconnected, described rotation lock device has unlock state in relative rotation that allows described first member and second member and the lock-out state in relative rotation that stops described first member and second member, and described rotation lock device comprises:
Ratchet, its with described first member and second member in the coaxial setting of a side and be connected to a described side in described first member and second member, and has disc-shape, the ratchet of described disc-shape has from the outer peripheral edge portion of this ratchet described first member of a described direction from described first member and second member and the opposing party in second member cylindrical shape part of giving prominence to vertically, and has the internal tooth that forms in the inner peripheral surface of described cylindrical shape part;
Guiding piece, its with described first member and second member in the coaxial setting of the opposing party and be connected to described the opposing party in described first member and second member, and has disc-shape, under the opposed facing state of the disc surfaces of described guiding piece and described ratchet, described guiding piece is incorporated into described ratchet, makes described guiding piece and described ratchet to relatively rotate;
Three ratchets, its be arranged on to devices spaced apart on the circumferencial direction of described guiding piece described guiding piece in the face of on the disc surfaces of described ratchet, described ratchet is maintained on the described guiding piece, only can make progress and move, and have the external tooth in the radially-outer surface that is formed on this ratchet in the footpath of described guiding piece; And
Cam, its coaxial being arranged on the described guiding piece, can be around axial rotation, when described cam during around axial rotation, described cam is along radially described three ratchets of outside thruster from the inboard of guiding piece, thus the described internal tooth engagement in the inner peripheral surface of the described external tooth that makes described ratchet and the described cylindrical shape part that is formed on described ratchet;
Wherein, owing to the layout along the circumferential direction of described three ratchets defines three spacing distances, one of them spacing distance is determined to be greater than all the other two spacing distances,
Single position on the part of the described inner peripheral surface of the described cylindrical shape part of described ratchet, circumferencial direction at described ratchet, form outstanding par, described outstanding par lacks described internal tooth and the radially inwardly outstanding top that surpasses described internal tooth, and two spacing distances of less all the other are determined to be the circumferential length less than described outstanding par.
2. rotation lock device according to claim 1, it is characterized in that, described three spacing distances that limit owing to the layout of described three ratchets are confirmed as: move through between described three ratchets in described outstanding par in the zone of described less all the other two spacing distances, when pushing away described ratchet, at least one and the described outstanding par that limit in the ratchet of less spacing distance always are in contact with one another.
3. rotation lock device according to claim 1 and 2, it is characterized in that, described guiding piece is provided with the support portion integratedly, the radially inward-pointing inner peripheral surface of this support portion has the outer peripheral face that can contact described cam and supports the circular-arc spill of the outer peripheral face of described cam, and described support portion is disposed in the bigger place in the spacing distance that is limited by described three ratchets.
4. rotation lock device according to claim 3, it is characterized in that, form described support portion by the half die-cut described guiding piece of described first member of described other direction from described first member and second member and the described side in second member on the thickness direction of the guiding piece of disc-shape.
5. rotation lock device according to claim 3 is characterized in that, at the interval with 90 degree on the circumferencial direction of described guiding piece described three ratchets and described support portion is arranged on the described disc surfaces of described guiding piece.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005278330 | 2005-09-26 | ||
| JP278330/2005 | 2005-09-26 | ||
| PCT/JP2006/317763 WO2007034683A1 (en) | 2005-09-26 | 2006-09-07 | Rotation lock device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101299946A CN101299946A (en) | 2008-11-05 |
| CN101299946B true CN101299946B (en) | 2010-05-19 |
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ID=37888735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006800413775A Active CN101299946B (en) | 2005-09-26 | 2006-09-07 | Rotation lock device |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US7766429B2 (en) |
| EP (1) | EP1929900B1 (en) |
| JP (1) | JP4816644B2 (en) |
| CN (1) | CN101299946B (en) |
| WO (1) | WO2007034683A1 (en) |
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- 2006-09-07 WO PCT/JP2006/317763 patent/WO2007034683A1/en active Application Filing
- 2006-09-07 EP EP06783220A patent/EP1929900B1/en active Active
- 2006-09-07 US US12/088,012 patent/US7766429B2/en active Active
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Also Published As
| Publication number | Publication date |
|---|---|
| EP1929900A4 (en) | 2010-09-15 |
| CN101299946A (en) | 2008-11-05 |
| EP1929900B1 (en) | 2012-12-05 |
| US20090256409A1 (en) | 2009-10-15 |
| EP1929900A1 (en) | 2008-06-11 |
| JPWO2007034683A1 (en) | 2009-03-19 |
| JP4816644B2 (en) | 2011-11-16 |
| US7766429B2 (en) | 2010-08-03 |
| WO2007034683A1 (en) | 2007-03-29 |
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